 -K|--custom-quant-matrices kvcd|tmpgenc|default|hi-res|file=input-file|help
                                                                                
       Specify which quantization matrices to  use  instead  of  the  defaults
       (which  can be specified by using "-K default").   Using "-K hi-res" is
       identical to using the -H option. The  value  kvcd  uses  the  Kvcd.Net
       matrices  from http://www.kvcd.net/; the value tmpgenc invokes the TMP-
       GEnc matrices from http://www.tmpgenc.net/e_main.html. On average (this
       depends  on the source material), the tmpgenc tables reduce the average
       bitrate by about 10% and the kvcd tables reduce bitrate  by  about  16%
       (compared to the default tables).
